China’s State Grid Corp Crushes Power Transmission Records – IEEE Spectrum
State Grid’s new 1100-kv line could help reduce renewable energy curtailment because Xinjiang’s wind and solar power plants are among China’s largest and also the country’s most heavily curtailed.
Challenges associated with absorbing power injected by big DC lines led to the break-up of China’s southern grid in 2016. State Grid is counting on another major UHV innovation — its growing network of 1000-kv AC lines — to solve that problem.


  1. Tomi Engdahl says:

    1200kV Circuit Breaker

    This Circuit Breaker is the highest rated circuit breaker in the world, only one unit is sufficient for three states of India. The engineers forgot to document (high quality video or stills) during its making and later asked me to make a film on the making of the circuit breaker. We had to understand how it was made and then with selective shooting, we made the film appear as if it had been shot in different phases during making of the circuit breaker. Scripted and directed by John Breakmas Kerketta. The engineering team was excellent and the film couldn’t be possible without their full participation…commendable!

  2. Tomi Engdahl says:

    World’s Biggest Electrical Transformer [With voltage upto 1100kV]

    The world’s first transformer, which Siemens developed and manufactured for high-voltage direct-current (HVDC) transmission systems with what is currently the highest transmission voltage of ± 1,100 kilovolts (kV). The workflows for manufacturing and testing this product were challenging due to the transformer’s extreme dimensions (LxWxH: 37.5 m x 12.0 m x 14.5 m) and shipped to China where the transformer will enable a high-voltage direct-current (HVDC) transmission with low losses over a record distance of 3,284 kilometers with a transmission capacity of 12 gigawatts.

    What is inside a Transformer? [DETAILED]

  3. Tomi Engdahl says:

    North-East Agra – the world’s first multi-terminal UHVDC transmission link

    The 800 kV North-East Agra UHVDC (ultrahigh-voltage direct current) link will have a record 8,000 MW converter capacity, transmitting clean hydroelectric power, equivalent to the generation of 8 large power plants, from India’s northeast region to the city of Agra, a distance of 1,728 km. The North-East Agra project is ABB’s fifth HVDC transmission link in India.

    North-East Agra
    Will supply electricity to serve 90 million people.

  4. Tomi Engdahl says:

    Longest Transmission Lines

    Power transmission and distribution are quickly revolutionizing to bring about more efficient transfer of energy.

  5. Tomi Engdahl says:

    The evolution of HVDC Light

    20 years ago, ABB pioneered another breakthrough: HVDC Light®. In the last two decades, ABB has increased the power capacity, raised the voltage levels and increased the distance capability while reducing transmission losses. Today, the latest offering brings significant enhancements and benefits to customers.

    HVDC Light (VSC)

    HVDC Light, based on VSC technology (Voltage Sourced Converter), is designed to transmit power underground and under water, also over long distances. It offers numerous environmental benefits, including “invisible” power lines, neutral electromagnetic fields, oil-free cables and compact converter stations.

    HVDC Light increases the reliability of power grids, and the technology extends the economical power range of HVDC transmission down to just a few tens of Megawatts (MW). In the upper range, the technology now reaches 3,000 MW and ±640 kV – enough electricity to power several million households and enabling power transmission over 2,000 kilometers. The system design enables compact converter stations – a big benefit in applications like offshore wind and interconnections.


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